Authenticator vs Tummy Meter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Authenticator
Simulate biometric authentication for creative projects. This app allows you to choose between palm, retina, or fingerprint scans, or passcode entry. Customize the outcome to always fail, always succeed, or use an override for demonstrations.
- Fake palm scanner
- Fake retina scanner
- Fake fingerprint scanner
- Passcode entry simulation
- Customizable authentication outcomes
- Override authentication option
Read full descriptionHide full description
An app for fake authentication for movie prop, plays, or demonstrations. Choose to scan palm, retina, fingerprint, or enter a passcode. Choose to always fail, always authenticate, or a variety of options, including an override to authenticate.
Tummy Meter
This app uses a simulated tummy scan to playfully determine a child's fullness level during mealtimes. It's designed to add a bit of fun and potentially ease the struggles of dealing with picky eaters. The results are randomly generated for entertainment.
- Fake tummy scan simulation
- Randomly generated fullness verdicts
- Designed for picky eaters
- No ads or sign-up required
- Works entirely offline
- Parent-created tool
Read full descriptionHide full description
Does your child suddenly "feel full" after two bites of broccoli but magically has room for dessert? Tummy Meter is the silly, science-y app that might save your sanity — with a fake tummy scan. Made by a parent, for parents — because the hard days of raising a picky eater deserve at least one tool that asks nothing in return. How it works 1. Place the phone gently on your child's tummy 2. Press the big scan button 3. Watch the machine whir to life. It beeps, it fake scans, and it delivers an official verdict: exactly how full their tummy is — and how many more bites they need to reach 100%. Completely free. No ads. No sign-up. No data collected. For entertainment only. Tummy Meter is designed to make mealtimes a little more fun. It does not measure anything real. Results are randomly generated for entertainment purposes. It works entirely on your device. Nothing is sent anywhere. No account needed. Just open it and scan.
Screenshots
Verdict
The clearest difference is ads: Tummy Meter at none against Authenticator's shown. Tummy Meter also leads on monetization model (free vs ad-supported). Authenticator's advantage is update cadence (every 2 days vs every 4 days). On price, rating, ratings volume and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Authenticator against 5.0 for Tummy Meter. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
Authenticator ships an update every 2 days, Tummy Meter every 4 days. The most recent releases landed on October 7, 2026 and October 2, 2026 respectively.
| Parameter | Authenticator | Tummy Meter |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (1 ratings) |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 2 days — better | Every 4 days |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 4 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | Harden Consulting LLC | Aryan Porwal |
Customer experience
Authenticator
Tummy Meter
In-app purchases
Authenticator
No in-app purchases
Tummy Meter
No in-app purchases
Questions
Is Authenticator free?
Is Tummy Meter free?
Which has better reviews, Authenticator or Tummy Meter?
Do Authenticator or Tummy Meter have ads?
Which is updated more often, Authenticator or Tummy Meter?
Other comparisons
