WTFat vs Spotter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WTFat
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This app has a physics engine and will make you to enjoy recording your body weight/fat! It is fun more than general scaling applications. Enjoy! *** Features *** - Input value to fun. - Graph for your data. (Weight/Fat at the same time) - List for detailed values. - Password settings. *** How to use it *** [ Weight/Fat ] 1. Choose the date. 2. Then, choose the weight you want use. (Also you can change it any time.) 3. Tap the display on the scale until your weight. 4. Push the register button, then done! [ Graph ] You can drag the graph for confirming any day. A pinch scaling feature can be used if you set up the configuration. [ List ] All data you recorded can be shown. If you flick a line, the remove button will be appeared. [ Settings ] - Reset All data can be deleted. You can choose all weights/all fats/both. - Glid Showing any lines can be changed, but I don't recommend using Y line of weight and fat at the same time. - Graph (Pinch scaling) The feature is for the graph, you can pinch in/out on that. - Privacy (Blind) You can blind the display, such as in a train, bus, and public places. (Password) When the app is started you must input password.
Spotter
This app helps you plan, track, and monitor your gym workouts. Gain insights into your progress with graphs and personal records to achieve your fitness goals. It offers an intuitive iOS-centric design for a seamless user experience.
- Workout planning
- Exercise tracking (reps, weight)
- Progress monitoring with graphs
- Personal records
- Unlimited custom exercises (PRO)
- Unlimited workout history (PRO)
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The gym tracker iOS has been missing. An advanced training tool to help you ensure you’re continuously making progress in the gym. Get deeper insights into how you’re improving your lifts week by week and month by month to help you reach your goals. With an iOS centric design it has the feel and functionality of an app made by Apple themselves! Spotter helps you: - Plan: Create all your workout routines to do when you’re at the gym - Track: When you’re at the gym input all the data related to your exercises, e.g. the number of reps and weight - Monitor & Progress: The app offers graphs and personal records to see how you’re improving in the gym and perhaps where you can make improvements. The app is fully usable without purchase for a limited number of workouts, after which you have to make a one off payment to continue using the app. No subscriptions at all. Features for Spotter PRO: - Unlimited workouts: Keep track of every single workout you do in the gym - Unlimited workout history: Get access to unlimited graph and workout history to see how you’ve progressed - Unlimited custom exercises: Can’t find an exercise you’re looking for? Create your own! - Personal records: Keep track of your achievements through your gym career, e.g. estimated 1 rep max For support contact us at contactus.spotterapp@gmail.com. Log your workouts with Spotter and take your gym experience to the next level.
Screenshots
Verdict
The clearest difference is price: Spotter at Free against WTFat's $1.99. Spotter also leads on update cadence (every 6 days vs every 4 months). WTFat's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement 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
Spotter is free to download; WTFat costs $1.99 up front. Spotter sells 1 one-off in-app purchase. WTFat asks for nothing beyond the download.
WTFat ships an update every 4 months, Spotter every 6 days. The most recent releases landed on May 16, 2026 and October 18, 2026 respectively.
| Parameter | WTFat | Spotter |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | — | 5.0 (5 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 5 — better |
| Update frequency | Every 4 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 5 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | yukihiro fujita | Tharuka Devendra |
In-app purchases
WTFat
No in-app purchases
Spotter
- Spotter PRO$11.99









