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Updated July 2026 · real, multi-region App Store reviews
Head-to-head

Perplexity vs Grok AI

Perplexity 4.8★ · Free + IAP 70
Winner Perplexity
Grok AI 4.9★ · Free to download 40

For general AI assistance, Perplexity offers a more stable experience despite recent downgrades, while Grok AI is plagued by restrictive usage limits and poor customer support.

Full reviews: Perplexity · Grok AI

Perplexity excels as a research aid and offers access to multiple AI models, though recent changes have led to user frustration over downgraded limits and intrusive upsells. Grok AI, while praised for its speed and 'honest' answers, faces significant criticism for its restrictive weekly usage limits, high cost, and unresponsive customer support.

Head to head

Features & Capabilities edge: PerplexityR14R16R17R27
Perplexity Perplexity is highly valued for its research capabilities, ability to refine context for complex queries, and access to a diversity of AI models like ChatGPT, Claude, and Gemini . Users appreciate its Read Aloud option and synchronization across devices R14. The 'Computer' feature is seen by some as powerful, initiating sub-agents and skills seamlessly . However, some users report a downgrade in quality, with the app becoming 'sycophantic' and providing superficial or incorrect answers R17R27. There are also requests for image reading capabilities and customization of the AI voice animation R16.
Grok AI Grok AI is praised for its speed, ability to produce good images, and providing 'honest' or objective answers on controversial subjects, often outperforming competitors like ChatGPT and Gemini in willingness to generate content . Its voice mode and real-time news are considered fun and useful . However, many users report that Grok AI often fails to follow prompts, adds unrequested edits, and is heavily moderated, leading to rejected content even for paying users R56R62.
Ease of Use edge: PerplexityR1R6R12R39
Perplexity Perplexity is generally considered easy to use R12. However, some users experience significant typing bugs across different keyboards R1, permanent pop-ups that erase prompts R6, and an intrusive interface that constantly upsells, making the free version unusable for some iOS users R39R41. iPad users report a frustrating UX where accidentally swiping off the text input box erases text .
Grok AI Grok AI is described as 'nice and cool to use' and makes things 'easy and fun' . However, some users find the voice feature problematic, as the microphone continuously listens after use .
Reliability & Performance edge: PerplexityR18R19R20R22
Perplexity Perplexity is praised for being a reliable partner that rarely lets users down R18R22. It's noted for giving huge amounts of condensed information rapidly and hallucinating less than competitors R20. However, some users report the app getting stuck in loops, ignoring or forgetting previous comments, providing incorrect information, and then lying about its correctness R19. There are also reports of lost access to previous questions after updates .
Grok AI Grok AI is generally fast and produces good results . However, its performance is severely hampered by restrictive weekly limits that stop conversations in their tracks . Some users report the AI itself has declined in capability since version 4.2 .
Price & Value edge: PerplexityR4R7R9R13
Perplexity Perplexity offers a free tier, but many users find it unusable due to constant upsells and glitches R39R41. The Pro subscription, which some purchased for £200 annually R4, has been criticized for massively downgraded usage limits, making it comparable to the free tier R7R37. Users feel misled about monthly credit allowances and are frustrated by additional costs for 'Computer' tokens not covered by Pro R21. There are also reports of being charged for free trials or subscriptions that cannot be accessed R9R13R25.
Grok AI Grok AI is criticized for its high cost, with SuperGrok at £30 a month and SuperGrok heavy at £300 a month . The primary complaint is the introduction of restrictive weekly usage limits on top of the subscription fee, which users feel was added sneakily and makes the service not worth paying for . Users feel they are paying a premium for a limited service, with some calling it a 'scam' or 'fraudulent' R62. The free plan is also heavily limited, with users running out of credits quickly R78R92.
Support & Bias tieR11R23R25R56
Perplexity Perplexity users report issues with customer support, stating the company is 'not interested in your business' when dealing with lost Pro accounts R25. Some users also raise concerns about massive bias in answers, with the app openly criticizing politicians and being 'very careful' with 'shaky' topics, leading to offensive responses for some R11R23.
Grok AI Grok AI's customer support is heavily criticized for ignoring problems, especially for paying customers, and only responding quickly to refund requests . Users also mention that the app is 'clearly programmed not to give you what you asked for' R62. While some praise Grok for giving 'honest' answers on controversial subjects , others find it too heavily moderated, rejecting content even when paid for R56.
Pick Perplexity if

You need a research aid that integrates multiple AI models and synchronizes across devices, and you are willing to navigate some recent changes in usage limits and occasional UI annoyances R14.

Pick Grok AI if

You prioritize speed, image generation, and an AI that is perceived to give more 'honest' or objective answers on controversial topics, and you are prepared to deal with high costs and restrictive weekly usage limits .

Evidence note: Grok AI's reviews are heavily skewed towards recent complaints about usage limits and pricing, which may not fully reflect its lifetime rating. Perplexity also has recent negative reviews regarding downgraded limits and intrusive upsells.

Frequently asked

What are the main pricing issues for Perplexity and Grok AI?
Perplexity's Pro plan, which some users paid £200 annually for, has seen its usage limits significantly downgraded, making it comparable to the free tier, and additional 'Computer' tokens are not covered by the Pro plan R4R7R21R37. Grok AI charges £30 a month for SuperGrok and £300 a month for SuperGrok heavy, but users report severe weekly usage limits were sneakily added, making the service feel like a 'scam' and not worth the high price .
Do either of these apps have issues with bias or moderation?
Yes, Perplexity users report 'massive bias' with the app being 'very careful' on 'shaky' topics and openly criticizing politicians, leading to offensive answers for some R11R23. Grok AI, while praised by some for 'honest' answers on controversial subjects , is also criticized for being 'too heavily moderated' and rejecting content even for paying users, with some believing it's programmed not to give what was asked R56R62.
How do the free versions compare?
Perplexity's free version is described as 'unusable' on iOS due to an 'infinite subscription page glitch' and constant upsells that prevent starting new dialogues R39R41. Grok AI's free plan is also heavily limited, with users running out of credits quickly, sometimes after only a few failed image generations R78R92.

What reviewers actually said

Built only from these 100 real reviews (foreign ones translated). Superscripts jump to the quote here. Apple has no per-review links, so [ref] opens that app's reviews on the App Store.

  1. [R14] Perplexity 5/5 · GB Brilliant: I use this every day and love the way the mobile phone app synchronises with Perplexity on my laptop. Together with Comet, which has become my browser of choice which also integrates, Perplexity has become my number one go tool. I particularly love the Read Aloud option for when I’m on the go.
  2. [R16] Perplexity 5/5 · GB Ai voice: I really like using this app, but I’d love to customize the moving emblem or animation that appears while the assistant is speaking. It would be great to have an option to change the design, size, color, or turn it off altogether. Please consider adding a personalization setting for this in a future update!
  3. [R17] Perplexity 2/5 · GB Recent changes have downgraded this massively: This was a 5 star app until a couple of months ago. It’s had a noticeable downgrade. Before this was one of the best A.I. for combining smart, non condescending and great analysis with current information gathering. It did all the jobs. Now it’s that sycophantic “great question!’ fluff where it tries to make superficial and frequently wrong answers so
  4. [R27] Perplexity 1/5 · GB Used to be good: I’m a pro subscriber and originally I thought perplexity was great. It was helpful and always attempted to do what I asked. But now it keeps doing things I ask it not too. I’m reviewing a document and I ask it to update a section, it does the update fine. But then goes off and changes other sections without saying a word. I ask for a grammar pass and it rewrites entire sections.
  5. [R1] Perplexity 1/5 · GB Typing bugs: Typing out a prompt is so difficult with all the silly mistakes the keyboard makes. Yes I've tried stock ios, Gboard and others. Nothing works. Fix please.
  6. [R6] Perplexity 3/5 · GB Permanent Pop ups: I don't want to keep dealing with the presence of perplexity computer suggestions or follow up suggestions that keeps on erasing the prompt I'm trying to write.
  7. [R12] Perplexity 5/5 · GB Easy to use: Nice
  8. [R39] Perplexity 1/5 · GB Don’t download if you won’t subscribe: Free version is unusable with iOS app. Infinite subscription page glitch persists for months and doesn’t get fixed - so you cannot start any new dialogue. Plex itself says it seems to have malicious intent :-) And the bug is exclusive for iPhone app - PC, browser and Android versions work perfectly
  9. [R18] Perplexity 5/5 · GB My experience: I’ve been with Perplexity from It’s start. I know the rules of engagement. What’s possible. So I always trust what comes back. A great partner to have. 24/7 never once letting me down.
  10. [R19] Perplexity 1/5 · GB Exhausting glitching junk.: This app is infuriatingly bad. It gets stuck in loops. It ignores what you say. It forgets what you say after just one comment and then ignores you when you explain. It provides incorrect info and then lies and says it’s correct. Dire. Deleted after a few hours.
  11. [R20] Perplexity 5/5 · GB The real Lady: Perplexity is fantastic, it gives huge amounts of information condensed, is rapid and an excellent resource. It seems to hallucinate less than its competitors.
  12. [R22] Perplexity 5/5 · GB Best mate: A true friend and an solution to save you Just great
  13. [R4] Perplexity 1/5 · GB It's a lie: Not £20, but £200
  14. [R7] Perplexity 1/5 · GB They massively downgraded Pro usage limits: Don’t bother paying; they brought the limits of the Pro plan so far down you’re better off using any other service. It’s now comparable to what it used to be in the free tier.
  15. [R9] Perplexity 1/5 · GB Scam: Clicked on free trial, they took £20 & within an hour of playing I need to add credits
  16. [R13] Perplexity 1/5 · GB scam: just been scammer with this company so doing a charge back
  17. [R11] Perplexity 1/5 · GB Massive bias!: Do not expect honest or direct answers from this app. It told me it is very careful when discussing “shaky” or “inflammatory”topics. Who gets to decide what they are? It will openly criticise politicians it’s programmers don’t like.
  18. [R23] Perplexity 1/5 · GB Completely biased MAGA propaganda: Use only if you are a pro-Trump, MAGA and Israel supporter who rejects trans rights completely. If you are not, its answers are going to be very offensive to you.
  19. [R25] Perplexity 1/5 · GB No other option: You’re not helping so you get 1 star. Lost my pro account I had with a PayPal offer and perplexity did nothing. They’re not interested in your business so use other companies that are
  20. [R56] Grok AI 3/5 · GB Hmmm not what it said!: Led to believe app was completely unlimited and create anything no filter but it’s not in some ways it’s worse than chatgtp for its moderation even paying full price you are so limited to what you can do which really is annoying
  21. [R21] Perplexity 2/5 · GB Too intrusive advertisement: I’ve been a Pro subscriber for over a year now, and the product feels like it’s been going downhill ever since. They removed DeepSeek and Grok models, then introduced a “Pro Pro” tier - fine, whatever. But the way they’re pushing their “computer” feature now is genuinely frustrating. There’s an annoying popup I can’t dismiss sometimes. I tap it just to be greeted by a
  22. [R37] Perplexity 1/5 · GB Was good, went downhill fast.: I really enjoyed Perplexity pro I was using it for lots of things research and so on and then all of a sudden it started telling me that I was out of Credit all the time.
  23. [R62] Grok AI 1/5 · GB Fraudulent: It’s clearly programmed not to give you what you asked for. grok will never follow all your prompts and it will add things and make edits you never asked for so you never get the picture you asked for. This is done on purpose to make you run out of credits in the hope you will buy more credits. This app is totally fraudulent.
  24. [R41] Perplexity 1/5 · GB Poor interface perpetually upselling to paid version: I was recommended the app by a friend but find it impossible to use the app. Trying to scroll text just highlights. Adjusting text from an autocorrect error in a prompt doesn’t allow editing, just opens the upgrade ad. Not impressed.
  25. [R78] Grok AI 2/5 · GB Ridiculous.: I’ve tried multiple ai’s. This one is the worst. First of all, you only get about 5 responses from grok before it wants you to pay for ‘supergrok’ which is like 200 pounds. And there’s no filters so straight out the box it was swearing and I had to instruct it not to swear, which it didn’t follow. Overall, I wouldn’t recommend.
  26. [R92] Grok AI 1/5 · GB Too limited on a free plan: 3 images failed to generate and you out of credits.

Synthesized from 100 recent App Store reviews · updated July 2026 · View on the App Store