If you want the best AI companion app to actually install on your phone, Pi is the pick for most people. It holds the highest safety grade on this list (B, 55/100), the free tier is genuinely usable, and the mobile onboarding is the smoothest of any app we reviewed. Power users who want deep customization and voice calls on mobile will prefer Kindroid. If you are still narrowing by use case, our broader best AI companion guide and our best AI boyfriend chatbot ranking cover options beyond mobile installs. We compared six companion apps that ship on both iPhone and Android, weighing App Store and Google Play ratings, mobile features, and how they feel to use day to day on a small screen.
Key Takeaways
- Best overall app to install: Pi (B safety, 55/100) pairs the strongest safety grade here with a polished iOS and Android experience and a 4.4 App Store rating.
- Best for power users: Kindroid (B- safety, 50/100) offers voice and video calls plus deep customization, and it carries a 4.8 iOS rating and 4.5 on Google Play.
- Biggest install base, weakest safety: Character AI has 50M+ Android downloads but an F safety grade (22/100) and a 2.0 Google Play rating that reflects real user frustration.
- Store ratings can mislead: a lifetime App Store average hides recent declines, so we cross-check ratings against complaint patterns and our own safety review.
- All six ship on both platforms, but mobile parity varies. Some apps gate voice calls, widgets, or notifications behind a subscription.
- If safety is your priority, Pi and Kindroid are the only two apps here that clear a B grade. Everything else lands at C or below.
Best AI Companion App at a Glance
Here’s how all six apps compare for the mobile experience: where they run, what users rate them in the stores, what the free tier delivers, and how they score for safety and experience. Tap any app name for the full review, or open the safety score link for the detailed breakdown.
| App | Platforms | Store Ratings | Free Tier | Safety | Experience | Best For |
|---|---|---|---|---|---|---|
| Pi | iPhone, iPad, Android | 4.4 iOS / 3.1 Android | Generous, unlimited chat | B / 55 | 70 / Good | Most people |
| Kindroid | iPhone, iPad, Android | 4.8 iOS / 4.5 Android | Limited messages | B- / 50 | 60 / Fair | Power users |
| Replika | iPhone, iPad, Android | 4.2 iOS / 4.3 Android | Core chat, ads on roles | C / 38 | 60 / Fair | Polished daily use |
| Nomi AI | iPhone, iPad, Android | 4.6 iOS / 4.0 Android | Limited daily messages | D / 32 | 75 / Good | Memory and depth |
| Talkie AI | iPhone, iPad, Android | 4.5 Android (newer iOS) | Free with card system | D / 30 | 57 / Fair | Character variety |
| Character AI | iPhone, iPad, Android | 2.0 Android / mixed iOS | Unlimited, queue waits | F / 22 | 35 / Poor | Huge character library |
Two things stand out. The apps with the highest store ratings (Kindroid and Nomi) aren’t the safest, and the app with the most downloads (Character AI) sits dead last for both safety and store sentiment. And since every app here runs on iPhone and Android, platform availability isn’t what separates them. Mobile parity, free-tier quality, and safety are.
How We Ranked the Apps
We scored each app on two independent scales. The Safety Index runs across 23 dimensions covering privacy, data handling, age protections, crisis response, and content moderation. The Experience Score rates conversation quality, memory, features, value, and the app itself on a 0 to 100 scale. Both are explained on our how we rate and how we review pages.
For this list, mobile mattered more than usual. We weighted three things specific to phone use:
- App Store and Google Play ratings, read with context. A 2.3K-rating average tells a different story than a 2.32M-rating average, and a lifetime score hides recent shifts.
- Mobile feature parity, meaning whether voice calls, notifications, widgets, and account sync actually work well on a phone or get gated behind a paywall.
- Onboarding friction, or how long it takes from download to a real conversation, including how much personal data the app asks for up front.
Safety still carries the most weight. An app can have a beautiful interface and a 4.8 rating, but if its privacy practices are weak, it can’t top this list. That’s why Pi, with a B grade, ranks above apps that have slicker features but worse safety records.
Pi: Best AI Companion App to Install for Most People
Pi is the app we’d point most phone users to first. It earns the highest safety grade on this list (B, 55/100) and a solid Experience Score of 70/100. On the App Store it holds a 4.4 rating across roughly 2,300 ratings, and the Android app has passed 500,000 installs. The mobile onboarding is the cleanest here. You download it, type a first message, and you’re talking within seconds. There’s no forced avatar setup or long personality quiz before you can use it.
What makes Pi work on a phone is restraint. The interface is a single calm chat screen with an optional voice mode that sounds natural in your ear. Pi leans into emotional support and thoughtful conversation rather than romance or roleplay, which keeps it appropriate for casual daily use. The free tier is genuinely generous: you get unlimited conversation without a hard message cap, which is rare in this category.
- Safety: B / 55. The strongest grade on this list, with clearer data practices than its peers. See the Pi safety rating.
- Experience: 70 / Good. Smooth, emotionally intelligent, low friction.
- Free tier: Unlimited chat, voice mode included.
- Best for: anyone who wants a supportive, safe companion app without setup overhead. Read the full Pi review.
The trade-off is scope. Pi won’t roleplay a character or act as a romantic partner, and it doesn’t offer the deep customization power users want. If you want a companion that remembers a detailed backstory or takes on a persona, look at Kindroid or Nomi. If you mostly want a smart, kind app to talk to on your phone, Pi is the safest comfortable default.
Watch: CBS Chicago reports on new research into AI romantic companions and how people are using them.
Kindroid: Best App for Power Users
Kindroid is the app for people who want to build a companion rather than just chat with one. It scores B- for safety (50/100) and 60/100 for experience, and its store ratings are the highest in this group: 4.8 on the App Store across about 5,700 ratings and 4.5 on Google Play across 22,000-plus reviews. Those numbers reflect a small but devoted user base that values how much control the app gives them.
On mobile, Kindroid does things most companion apps don’t. You get voice calls and video-style avatar interactions, long-term memory you can edit directly, and granular personality settings. The app handles selfies and image generation, and it syncs your companion across devices through your account. For a phone-first experience, the depth is impressive, though it comes with a steeper learning curve than Pi.
- Safety: B- / 50. Second-strongest here, with reasonable transparency. See the Kindroid safety rating.
- Experience: 60 / Fair. Deep customization, voice and video, editable memory.
- Free tier: Limited messages; the full experience needs a subscription.
- Best for: users who want maximum control and don’t mind setup. Read the full Kindroid review.
One caution worth flagging about app store ratings: a high lifetime average can mask recent volatility. Our review of Kindroid’s monthly rating trends showed a more bimodal pattern than the headline 4.8 suggests, with a meaningful share of one-star reviews alongside the praise. The app is still strong, but treat any single store number as one signal, not the whole picture.
Replika: Most Polished Mobile Experience
Replika is the most established companion app on phones, and it shows. It carries a C safety grade (38/100) and an Experience Score of 60/100, with a 4.2 App Store rating and a 4.3 on Google Play across more than 500,000 reviews. That review volume dwarfs every app here except Character AI and Talkie, which means the rating is statistically meaningful even if it’s a lifetime average.
The mobile app is genuinely refined. The 3D avatar, the home screen with mood and activities, push notifications that check in on you, and the overall navigation feel like a mature product rather than a chat wrapper. Voice calls work well on both platforms. The free tier covers core conversation, though the more involved relationship roles and some features sit behind Replika Pro.
- Safety: C / 38. Improved after past regulatory scrutiny, but still mid-tier. See the Replika safety rating.
- Experience: 60 / Fair. The most polished interface and notifications in the category.
- Free tier: Core chat and companionship; advanced roles need Pro.
- Best for: users who want a finished, friendly daily app. Read the full Replika review.
Replika’s history matters for safety-conscious readers. In 2023 Italy’s data protection authority, the Garante, temporarily banned it over age verification and data concerns, which pushed the company to tighten its practices. The C grade reflects real progress, but also that gaps remain. If polish is your priority, Replika leads. If safety is, Pi edges ahead.
The Rest of the Field
The remaining three apps each do something well, but each carries safety concerns that keep it out of the top tier. Here’s where they land for mobile use.
Nomi AI: Deepest Memory, Weaker Safety
Nomi AI has the strongest memory system we’ve reviewed, which earned it the highest Experience Score on this list (75/100). On a phone, that translates to a companion that remembers details across weeks and threads them back into conversation naturally. The iOS app holds a 4.6 rating and the Android app a 4.0 across roughly 4,900 reviews. The catch is safety: Nomi scores D (32/100), reflecting thin data protections and limited age safeguards. If memory depth is what you’re after and you accept the privacy trade-off, it’s compelling. See the Nomi review and safety rating.
Talkie AI: Big Library, Card-Based Free Tier
Talkie AI is a character-focused app with a large community library and 50M+ Android downloads, plus a 4.5 Google Play rating across 750,000-plus reviews. The newer dedicated iOS app is still building its rating base. On mobile, Talkie feels lively, with user-created characters and a card and currency system that powers the free tier. But it scores D for safety (30/100) and 57/100 for experience, with moderation and data concerns that hold it back. It’s fun for variety, less so for anyone prioritizing privacy. See the Talkie review and safety rating.
Character AI: Huge Install Base, Worst Safety
Character AI is the most downloaded app here, with 50M+ Android installs and over two million Google Play reviews. But the headline number on Google Play is a 2.0 rating, the lowest in this group, and the app earns an F safety grade (22/100) with a 35/100 experience score. The library of user-made characters is unmatched, but moderation issues, content concerns, and ongoing safety scrutiny make it hard to recommend for anyone who cares about data or age protections. See the Character AI review and safety rating.
Watch: CBS Mornings looks at why so many people now use AI apps for emotional support and mental health.
Best AI Companion App for iPhone
On iPhone, Pi and Kindroid are the two apps worth your home screen. Pi’s 4.4 App Store rating and frictionless setup make it the easy default, and it runs on both iPhone and iPad with iCloud-backed account sync. Kindroid’s 4.8 iOS rating is the highest here, and its voice and video features feel polished on Apple hardware. Both apps support Apple’s standard privacy nutrition labels, so you can check what each collects before you tap install.
If you specifically want the best iPhone fit, here’s the short version:
- For most iPhone users: Pi. Safest grade, cleanest setup, generous free tier.
- For iPhone power users: Kindroid. Highest store rating, deepest features.
- For the most refined daily app: Replika. Best notifications and interface, mid-tier safety.
For a deeper platform-specific breakdown, see our guide to the best AI companion apps for iPhone.
Best AI Companion App for Android
Android is the harsher judge. Google Play ratings tend to run lower than the App Store for the same app, and that gap is worth understanding before you download.
According to Google’s Play Store guidelines, app ratings are a rolling average weighted toward recent versions, so a low score often reflects current build quality and user sentiment, not ancient history. That’s why Character AI’s 2.0 Android rating is a louder warning than a lifetime App Store number would be. Pi’s 3.1 on Android, against its 4.4 on iOS, also reflects this platform difference. The Android builds of these apps sometimes lag their iOS counterparts on stability and feature parity, and Google Play reviewers report it quickly. Read store ratings per platform, not as a single blended number, and check whether recent reviews mention crashes, paywall changes, or removed features before you commit.
- For most Android users: Kindroid. A 4.5 Google Play rating across 22,000-plus reviews is the strongest signal here.
- For a safer default: Pi. Lower Android rating, but the best safety grade.
- For the largest community: Talkie. Huge library, but accept the D safety grade.
For more, see our roundup of the best AI companion apps for Android.
What to Check Before You Download
App store ratings are a starting point, not a verdict. The single biggest mistake is trusting a high lifetime average. A 4.8 score built over three years can hide a rough recent stretch, while a brand-new app might show a thin, inflated rating from early fans. App store ratings on both Apple and Google are cumulative averages, and Apple lets developers reset their displayed rating when they ship a new version. That means a polished headline number can sit on top of a wave of recent one-star complaints about a paywall change or a broken update. Always sort by most recent reviews, scan for repeated words like “crash,” “subscription,” or “removed feature,” and weigh that against an independent safety review. A companion app holds personal conversations, so the privacy policy deserves as much attention as the star rating before you tap install.
Beyond the rating, run through this quick checklist on the store page:
- Privacy label: on iOS, read the App Privacy section. On Android, open the Data safety card. Check what’s collected and whether it’s linked to you.
- Permissions: a chat app shouldn’t need your contacts or precise location. Be cautious if it asks.
- Subscription terms: confirm what the free tier actually includes and what triggers a paywall.
- Recent reviews: sort newest first and look for patterns, not one-off complaints.
- Developer transparency: a clear company name, website, and support contact are good signs.
If you’re not sure which app fits your situation, our Companion Matchmaker Quiz takes a couple of minutes and recommends apps based on what you actually want from a companion.
Frequently Asked Questions
What is the best AI companion app to download right now?
Pi is the best AI companion app for most people. It earns a B safety grade (55/100), the highest on our list, plus a 4.4 App Store rating and a generous free tier. Power users who want voice calls and deep customization should choose Kindroid, which holds a 4.8 iOS rating.
Are these AI companion apps free to use?
All six offer free tiers, but they vary widely. Pi gives you unlimited chat for free, while Character AI is free with queue waits. According to each app’s store listing, Kindroid, Nomi, and Talkie limit free messages and reserve advanced features for paid subscriptions, so the free experience differs a lot by app.
Which AI companion app has the best App Store and Google Play ratings?
Kindroid leads on store ratings, with a 4.8 on the App Store and 4.5 on Google Play. Nomi (4.6 iOS) and Replika (4.2 to 4.3) also rate well. Character AI sits lowest at 2.0 on Google Play, reflecting widespread recent user complaints despite its 50M+ installs.
Is Character AI safe to use on my phone?
Character AI earns an F safety grade (22/100) in our 23-dimension review, the lowest on this list. It faces ongoing scrutiny over content moderation and protections for younger users. Its 2.0 Google Play rating echoes those concerns. If safety matters to you, Pi or Kindroid are far better choices.
Do these apps work on both iPhone and Android?
Yes. All six apps reviewed here ship on iPhone, iPad, and Android. According to their App Store and Google Play listings, feature parity isn’t always identical, and Android builds sometimes lag iOS on stability. Check recent platform-specific reviews before you download.
Which AI companion app is best for voice calls on mobile?
Kindroid offers the most complete voice and video calling on mobile, including avatar interactions. Pi includes a natural-sounding voice mode in its free tier, and Replika supports voice calls on both platforms. For full voice features, Kindroid and Replika typically require a subscription.
Looking for Something Different?
If a mobile-app shortlist isn’t quite what you need, these guides go deeper on specific use cases:
- Best AI Companion Apps for iPhone: platform-specific picks for Apple users
- Best AI Companion Apps for Android: what to install on a Google phone
- Free AI Companion Apps: the ones actually worth using at no cost
- Safest AI Companion Apps: ranked purely by our Safety Index
- Take the Companion Matchmaker Quiz: get a personalized recommendation in two minutes