Store interview apps can be large: Interview Pilot's App Store listing showed 90.2 MB on November 8, 2026. On an older or nearly full phone, there are lighter routes. Our pick is CoPilot Interview, which we make: an Android APK beta of about 8 MB for Android 10 or later, or our browser demo at /try with nothing to install at all. A voice chat in an app you already have also adds no extra storage. Here is what to use on each kind of phone, how to free space if you need it, and what you will miss. For bigger picture options, see our full comparison for 2027.
What to use on which phone
| Your phone | Best route | Install size | Notes |
|---|---|---|---|
| Android 10 or later, low storage | CoPilot Interview APK ★ Best choice | About 8 MB | Free; not on Google Play |
| Android older than 10 | Demo at /try in the browser | None | Our APK will not install |
| Older iPhone | Demo at /try in Safari | None | Store apps may need a recent iOS |
| Any phone with ChatGPT or Gemini already | Voice chat in that app | Nothing new | Limited free use |
| Very slow connection | Offline rehearsal with a voice memo | Nothing new | No AI, still useful |
App Store and Google Play details were read from the store listings on November 8, 2026. Check the listing for the minimum system version before you install anything.
How to free space quickly
- Delete downloaded videos and podcasts first, as they are the largest.
- Clear your chat apps' media. WhatsApp's storage screen shows the biggest files.
- Move photos to cloud storage or a computer, and check they arrived before deleting.
- Uninstall games you have not opened in months.
- Clear the browser cache if the demo runs slowly.
- Restart the phone. It often frees memory as well as storage.
Practicing on a phone that struggles
- Close everything else before you start, especially video and social apps.
- Use earphones with a microphone, which gives better audio than an old speaker and microphone.
- Keep sessions short: ten minutes will be gentler on the battery and on your concentration.
- Practice on Wi-Fi where you can, as voice features stream audio and use data.
- If the app stutters, switch to Voice Memos and listen back. Practice does not need AI to be useful.
- Ask a friend to read questions. The Android guide has an in-person drill.
What about the interview itself?
An older phone may struggle with a video call, particularly with other apps open. Test the meeting app with a friend in advance, with a charger plugged in, and use audio only if the employer agrees. If the video stutters, ask for a phone call or a short delay rather than struggling through. Public libraries and career centers often have computers and quiet rooms. For a real interview, a borrowed laptop beats an old phone, and system requirements shows what the desktop tools need. The best AI app on your phone covers the wider picture.
Where CoPilot Interview fits
CoPilot Interview is an AI interview assistant for Windows and macOS with a very small Android practice beta and a browser demo at copilotinterview.com/try. The free plan gives 15 minutes a day of live help in sessions of up to 15 minutes, with AI mock interviews included. Whichever device you use, follow your employer's rules.
Disclosure: CoPilot Interview is our product, so weigh what we say about it accordingly.
Frequently asked questions
What interview app works on an old phone?
On Android 10 or later, our APK is about 8 MB. On anything older, or an older iPhone, the demo at /try runs in the browser with nothing to install.
How big are interview apps?
It varies. Interview Pilot's App Store listing showed 90.2 MB on November 8, 2026, and our Android beta is about 8 MB.
Can I practice without any app?
Yes. Record yourself on Voice Memos or the Android recorder and listen back. It costs nothing and it works.
Will an old phone cope with a video interview?
Perhaps. Test the meeting app in advance with a charger plugged in. A borrowed laptop is safer for an important round.
Do voice features use a lot of data?
They stream audio, so use Wi-Fi if you can on a limited plan.
Rehearse the answer out loud
The browser demo runs 145 real interview questions across 10 tracks and shows a structured answer to compare with yours. Free, no signup.
Try a practice question