Comparison

Tether | algorithm vs RollCall

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Tether | algorithm

Features
Read full description

Tether is a set of social tools that help people build better real-world relationships, acting as a sort of digital connective tissue. With Tether, you can coordinate social events, message individual friends or friend groups, and stay-up-to date with each others' lives through a non-addictive social feed.

About

RollCall

This social app transforms group chats into daily photo challenges for friends. Complete the challenge or face a group-decided punishment. Compete to keep your group's streak alive and share laughs.

Highlights
  • Daily photo challenges
  • Group-decided punishments
  • Streak tracking
  • Photo voting and flagging
  • Group interaction
Features
Read full description

RollCall is the daily photo challenge game for friend groups. One challenge a day. Post before the deadline, vote on your friends' photos and keep your streak alive. Miss it, and you're spinning for a punishment. HOW IT WORKS Start a group Create a private group, invite your friends and set the stakes: the list of punishments anyone who misses could land. Take the daily challenge Every day your group gets a new photo challenge. Everyone has until the deadline to post. Vote on each other's photos Star your favourites and call out the low-effort ones. Get voted down enough and you've earned a punishment. Face the punishment Miss the challenge and you spin for a punishment from your group's list. Post proof you did it, or sit out the group until you do. Climb the leaderboard Streaks, stars and completed punishments all count toward your score. See who's actually showing up. WHY ROLLCALL Gives the group chat something to do every day Private groups, just for your friends Dumb photo challenges, not perfect posts Real stakes, so nobody can quietly drop out without copping it from yuo and your friends ROLLCALL+ Everything above is free. RollCall+ adds: Unlimited groups, with up to 20 members each One punishment skip a month Bring back a broken streak Set your group's own challenge hours Choose your name colour and badge Your group. Your streak. Your punishment. Download RollCall and start your first challenge today. Terms of Service: https://rollcallapp.social/legal/terms-of-service Privacy Policy: https://rollcallapp.social/legal/privacy-policy License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Tether | algorithm4 screens
RollCall4 screens

Verdict

The call

The clearest difference is in-app purchases: Tether | algorithm at none against RollCall's 2. On price, update cadence, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. RollCall sells 2 in-app purchases, starting at $3.99 per month. Tether | algorithm asks for nothing beyond the download.

UpkeepUpdate frequency

Tether | algorithm ships an update weekly, RollCall every 5 days. Both last shipped on October 3, 2026.

Scorecard1 real difference · 9 level
Tether | algorithm versus RollCall: the parameters behind the verdict, then further details
ParameterTether | algorithmRollCall
PriceFreeFree
Rating—4.7 (3 ratings) — better
Positive reviews—71.4% of reviews
Number of ratings—3 — better
Update frequencyWeeklyEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhoneiPhone
Requires iOS17.0 — better18.0
Further details — not scored
Size34 MB10 MB
Age rating17+12+
DeveloperJason HindleySky Enterprises Australia Pty Ltd

In-app purchases

None

Tether | algorithm

No in-app purchases

2 purchases

RollCall

Subscriptions1
  • RollCall+ Monthly$3.991 Month
One-time1
  • RollCall+ Lifetime$19.99

Questions

Is Tether | algorithm free?
Tether | algorithm is free to download, with no in-app purchases.
Is RollCall free?
RollCall is free to download, with in-app purchases available.
Do Tether | algorithm or RollCall have ads?
Neither Tether | algorithm nor RollCall shows ads.
Which is updated more often, Tether | algorithm or RollCall?
Tether | algorithm ships an update weekly, and RollCall every 5 days. Most recently, Tether | algorithm was updated on October 3, 2026 and RollCall on October 3, 2026.

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