The Best Progress Photo Comparison Apps (Side by Side, Same Light, Same Pose)
The best apps to compare progress photos side by side, ranked on what a fair comparison needs: matching framing, dates and weight on the card, and private storage.
You took the photos. Now you want to put two of them next to each other and see if anything changed. Your camera roll is a bad place to do that: the photos are buried between screenshots, and you can't line them up.
So you're looking for a progress photo comparison app: something that keeps the photos in one private place and puts any two side by side. This post ranks the options on the things that actually make a comparison fair, not on how many filters they have. If you want help taking the photos in the first place, that's a separate job, covered in how to take progress photos you'll actually use.
What a fair comparison needs
A side-by-side view is easy. One you can trust is harder. Four things decide it:
- Same framing. If you stood closer, or the phone was lower, the "change" is the camera. The best apps help with an overlay of your last photo (often called ghost mode) so you can line yourself up before you shoot.
- Same light. No app can fix this. Same room, same time of day, same lamp.
- The context on the card. Two photos with no dates are a guessing game. A good comparison shows the dates, the gap between them, and ideally a weight from around the same day, so the picture sits next to the other numbers instead of replacing them.
- Private storage. These photos are yours. You want them out of your camera roll, behind a lock if possible, and backed up somewhere so a new phone doesn't erase a year of them.
Everything below was checked against each app's own App Store listing, website, or help center in October 2026. Where a listing didn't say something, we say that too.
1. Body tracker: Photo & measure (best dedicated photo tool)
This iPhone app by Igor Korolev does one job carefully. Its App Store listing describes a grid and a previous-photo overlay to help you match your position, plus a timer so you can get in place. For comparing, it has a slider view where you drag a divider across two photos, and the classic side-by-side view is still there if you prefer it.
It also tracks body measurements (waist, hips, arms and more) with charts and measuring guides, and it can import weight from Apple Health.
Privacy: the developer says it doesn't upload your photos to its servers, and Pro adds an app lock with Face ID or a PIN.
Price: free to download, with Pro sold as a one-time purchase, not a subscription. The listing shows a few different in-app prices, so check what you're offered.
Worth knowing: because photos aren't uploaded, think about how you'd move them to a new phone before you depend on it. The listing also says it's iPhone only.
Pick it if: you want the best alignment tools in a standalone app and you'd rather pay once.
2. PhotoJourney (best for schedules and time-lapses)
Listed as "My Body Tracker: PhotoJourney," this one leans into routine. You set a photo schedule, use guides and Ghost Mode to match your framing, and the listing says you can view before-and-after photos side by side or swipe between them to spot small changes. Date stamps keep the timeline in order, and you can export a time-lapse or a GIF.
Price: free with in-app purchases for PhotoJourney Pro.
Worth knowing: the listing's privacy label says identifiers may be used to track you across other companies' apps and websites. For an app that holds body photos, read that label and the privacy policy before you start.
Pick it if: reminders and a time-lapse at the end are what keep you taking photos at all.
3. Hevy (best if you already log workouts there)
Hevy is a workout log first, but it has progress photos attached to its measurements. Its help center describes an Overlay button on the in-app camera that lays your last progress photo over the screen "so you can line yourself up with it to get consistent angles." Tap any photo and you can compare it with another, and its feature page says you can place two photos side by side. Photos sit on a measures entry where you can add body weight and other numbers if you want.
Privacy: Hevy says progress photos stay private even if your profile is public.
Worth knowing: you can add one progress photo per day. Hevy's help pages say free accounts can log body weight and waist, with more measurements on Pro, but we couldn't confirm whether any part of the photo feature itself sits behind Pro.
Pick it if: you already log your sets in Hevy and don't want another app. (If you're choosing a log, we compared it in Hevy vs. Strong.)
4. MacroFactor (best if you already track food there)
MacroFactor is a nutrition app, and its photo feature is built around its body metrics. You can track front, side, and back views. The gallery shows each photo with that day's metrics and can put two photos from different dates alongside each other. Its help center describes a before-and-after builder: pick a pose, pick the before and after from a date-ordered ribbon, choose a background, and share it.
Worth knowing: MacroFactor has no free tier. Its App Store listing offers a 7-day trial, then a subscription. Its pages don't mention an alignment overlay.
Pick it if: you already pay for MacroFactor. Nobody needs to subscribe to a macro tracker just for photos.
5. Gym Bully AI (best if photos are a side dish to showing up)
Honest placement: Gym Bully AI is not the best pure photo app on this list. It has no ghost overlay, so a strip of tape on the floor does that job. What it does well is the card.
Its progress photo comparison keeps every photo on a timeline with its date. Pick any two and they sit side by side with the time between them ("12 weeks apart") and, when you've logged a weigh-in within two weeks of both photos, the weight change from your weight tracker. That change is shown plainly, with no judgment, because gaining or losing can both be the goal. The timeline backs up to your account so it follows you to your next phone. There's an optional AI body fat estimate that comes back as an approximation, not a lab number. And you can export a comparison image if you want to send it to a coach.
The rule that matters most: the bullies never see your photos, your weight, or your food. They never mention them. The bullies only care whether you showed up on the days you picked, and that's their whole job: on your training days they text you, each message ruder than the last, until you tap DONE or check in at the gym.
Price: one subscription unlocks everything: $59.99 a year with a free first week, $9.99 a month, or $129.99 once for lifetime. iPhone only.
Pick it if: your real problem is the weeks you don't train, and you'd like the photos, weigh-ins and workouts in the same place.
The free option: your iPhone and a piece of tape
You don't need an app to compare two photos. On an iPhone running iOS 16 or later, the Hidden album in Photos is locked by default and opens with Face ID or Touch ID, according to Apple. Move your progress photos there, take them on a timer from the same spot, and when you want to compare, open two in a free collage or just flip between them.
What you lose: no overlay, no dates on the card, no weight next to the photo, and it's on you to keep the setup consistent.
Quick comparison
| Alignment overlay | Side by side | Weight on the card | Cost model | |
|---|---|---|---|---|
| Body tracker: Photo & measure | Yes, plus grid | Yes, plus slider | Not described | One-time Pro |
| PhotoJourney | Ghost Mode | Yes, plus swipe | Not described | Free + Pro |
| Hevy | Overlay button | Yes | Weight on the entry | Free + Pro |
| MacroFactor | Not mentioned | Yes | Metrics in the gallery | Subscription only |
| Gym Bully AI | No | Yes | Yes, from nearby weigh-ins | Subscription or lifetime |
| iPhone Photos | No | Manual | No | Free |
"Not described" means the app's own pages didn't say, not that the feature is missing.
How to compare without fooling yourself
Whichever app you pick, the comparison is only as good as the habits around it:
- Compare photos at least a month apart. Week to week, you're mostly looking at water, lighting, and sleep.
- Same pose next to same pose. Front to front, side to side. Relaxed to relaxed.
- Read the photo with the other numbers. Your lifts, your weekly weight trend, how your clothes fit. A day's weigh-in swings for boring reasons, which is why we wrote why your weight fluctuates day to day.
- Don't chase a verdict. If nothing looks different after a month, check the setup before you decide nothing changed.
And the change in the photos comes from the weeks between them. That's why we'd rather you judge yourself on showing up than on the picture, an idea we argue for in process vs. outcome goals.
A kind note before you start
For some people, comparing photos turns into checking: looking again and again for flaws and feeling worse each time. If taking or comparing photos leaves you anxious or down on yourself, it's fine to stop and track something else, like the weight on the bar or the number of days you trained. If you've had an eating disorder, or think you might be struggling with one, talk to a doctor or a specialist before you start tracking your body. None of the apps here, ours included, are a substitute for that.
Frequently asked questions
What's the best app to compare progress photos side by side? For a dedicated photo tool, Body tracker: Photo & measure has the strongest alignment help (a grid and previous-photo overlay) and a slider view. PhotoJourney is close behind with Ghost Mode and time-lapses. If you already use Hevy or MacroFactor, their built-in comparisons are good enough.
What is ghost mode in a progress photo app? A faint copy of your last photo laid over the camera screen, so you can match your stance and distance before you take the new one.
Can I compare progress photos for free? Yes. Your iPhone's locked Hidden album plus a consistent setup works. You just give up the overlay and the dates and weight on the card.
Will the bullies in Gym Bully AI see my progress photos? No. The bullies never see or mention your photos, your weight, or your food. They only talk about whether you showed up.
The takeaway
The best progress photo comparison app is the one that helps you take the same photo every time and shows you the date and the context next to it. Body tracker and PhotoJourney lead on alignment, Hevy and MacroFactor are good if you already live there, and your iPhone works for free. The photos will only ever show what happened between them, so the bigger job is showing up. Get the app and let the bully handle that part.